[19p-P8-1~13] 9.2 ナノワイヤ・ナノ粒子

▲ [19p-P8-5] Growth of SiC Nanowires and Nanocones Using Mixture of Oil Palm Fibres and Rice Husk Ash

〇(D)Yi Ling Chiew¹、Kuan Yew Cheong²、Yoshifumi Oshima¹ (1.School of Materials Science, Japan Advanced Institute of Science and Technology、2.Electronic Materials Research Group, School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia)

キーワード：nanowires, SiC, growth mechanism

3C-SiC nanowires and nanocones were grown by pyrolyzing mixture of acid-treated oil palm empty fruit bunch fibres and rice husk ash (RHA), which acted as carbon and silicon source, respectively. The effects of different RHA amounts and pyrolysis temperature were studied. When the amount of RHA was increased to 80% of the mixture, there was a change in morphology from nanowires to nanocones. Overall, it was found that 40% of RHA in the mixture was the ideal amount in growing the nanowires with maximum yield and with the least impurities. When the pyrolysis temperature was raised, there was an increase in the amount, diameter and length of nanowires. The proposed main growth mechanims for the SiC nanowires were a combination of solid-state reaction and vapor-solid mechanisms, with some nanowires grown under vapor-liquid-solid (VLS) mechanism induced by trace metals as well. The growth of nanocones could also be related to VLS mechanism.